doc/README.fsl-hwconfig

   1 Freescale-specific 'hwconfig' options.
   2
   3 This file documents Freescale-specific key:value pairs for the 'hwconfig'
   4 option.  See README.hwconfig for general information about 'hwconfig'.
   5
   6 audclk
   7         Specific to the P1022DS reference board.
   8
   9         This option specifies which of the two oscillator frequencies should be
  10         routed to the Wolfson WM8776 codec.  The ngPIXIS can be programmed to
  11         route either a 11.2896MHz or a 12.288MHz clock.  The default is
  12         12.288MHz.  This option has two effects.  First, the MUX on the board
  13         will be programmed accordingly.  Second, the clock-frequency property
  14         in the codec node in the device tree will be updated to the correct
  15         value.
  16
  17         'audclk:11'
  18                 Select the 11.2896MHz clock
  19
  20         'audclk:12'
  21                 Select the 12.288MHz clock
  22
  23 usb
  24         Specific to boards have USB controller
  25
  26         This option specifies the following for a USB controller:
  27
  28                 - which controller mode to use
  29                 - which USB PHY to use
  30
  31         This is used by generic USB device-tree fixup function to update
  32         modified values of phy type and controller mode.
  33
  34         Also used for configuring multiple USB controllers such that
  35         'usbN' (where N is 1, 2, etc. refers to controller no.)
  36
  37         'phy_type'
  38                 Select USB phy type: 'utmi' OR 'ulpi'
  39
  40         'dr_mode'
  41                 Select USB controller mode: 'host', 'peripheral' OR 'otg'
  42
  43         Examples:
  44                 usb1:dr_mode=host;usb2:dr_mode=peripheral'
  45
  46                 usb1:dr_mode=host,phy_type=utmi;usb2:dr_mode=host'